by Veloran on Tue Apr 14, 2009 11:28 am
An EFIE (Electronic Fuel Injection Enhancer) is used to adjust the signal from the oxygen sensor(s) before they get to the engine's computer to compensate for an increase in fuel efficiency brought about by another fuel efficiency device. The purpose of the EFIE is not to provide fuel efficiency. It's purpose is to make it possible for our HHO generator to work properly. Basically a fuel efficiency device makes the engine think something is wrong, and makes it do things to adjust for this "wrongness". The actions it takes based on the oxygen sensor data, makes it negate the efficiency increase that would have been realized by the efficiency device. The EFIE solves this by adjusting the signal to the computer so the computer is happy with the readings it's getting and it's making the correct adjustments for the various conditions of the engine.
Basically, the oxygen sensor tells the computer it's oxygen readings by providing a voltage between 0 and 1 volt. In order to adjust this "data" the EFIE adds a small voltage to that delivered by the oxygen sensor. The EFIE is highly adjustable. Adjustments to the trim screw can change the EFIE's voltage correction by tiny amounts; a millivolt or 2 (.001 volt).